This another useful presentation by renowned engineer S.L. Khan. In this video, Mr. Khan teaches you how to determine the concrete work (volume) for the I shaped girder of a bridge.

By applying the following formula, the volume of girder is calculated :-

Volume of girder = cross section area x length of the girder

Calculation is made on the basis of the following steps :-

1) Transform the section into simple geometry.2) Work out section area of each segment.3) Add sectional areas of segments= total sectional area.4) Multiply total section area with the length of girder = volume or concrete work

To make the calculation, the solution is given to the following problem :-

Problem : Determine the volume of concrete work for the specified girder. Consider the length of the girder as 20 feet. If there is any steel, just omit it.